Burner igniter



Dec. 4,1923. 1,476,201

f P. C. HAAS BURNER I GNITER Filed June 16 1922 :ala 37,

38 7 AAA/ gig-f' m MM.

Patented Dec. 4, 1923.

UNITED. STATES A 1,476,201 PATENT oFFlcE.

PA-UIL C. HAAS, F ANN ARBOR, MICHIGAN, ASSIGNOR 0F ONE-HALF TO FRANK M.

xELLoGG, or ANN Anson, MICHGAN.-

BURNER IGNI'LER.'A

application medium 16, 1922. serial No. 568,704.

To all 'whom 'it may concern:

Be it known that I, PAUL C. HAAS, a citizen of the United States, andresiding at Ann Arbor,zin the county. of Washtenaw and State ofMichigan, have invented a new -and Improved Burner Igniter, of which thefollowing is a specification.

This invention relates to automatically operating means for forcing ajet of atomized fuel into a combustion chamber, and its object is toprovide vmeans `for igniting the fuel when the atmospheric temperature'at a selected place falls below a predetermmed degree and for stoppingthe action of such jet producing means when the temperature at suchselected place rises above another predetermined degree. A furtherobject of this invention is to provide electrically operated means forproducing the jet and igniting it by an electric spark, the spark beingdiscontinued when no longer needed.

In the accompanying drawing, Fig. 1 is a diagrammatic view of a fuelfeeding and igniting device embodying the present invention. Fig. 2 is asection of the mounting for one of the igniting electrodes. 4

Similar reference characters refer to likevparts throughout` the severalviews.

` constitutes the other /In Fig. lare shown conventionally a fan blower1 and a motor 2 for driving it. One end ofthe tube 3 connectetd to .thedischarge end 4 of the blower constitutes, the combustion chamber,although any other desired form of combus tion chamber may be employed.A Afuel pipe 5 having an atomizer 6 at its upper end -1 conducts fuel tothe combustion chamber. Adjacent the nozzle 7 of the atomizer are theelectrodes 8 and 9 between which passes the igniting spark.4 Theelectrodes 8 may be a portion of 'the' tube 3 if desired. An electriccircuit 10 including av secondary winding 11 of an induction coil'connects to these electrodes.

The operating alternating current is obtained from the conductors 13yand 14't0 which the service wires 15 and 16 connect. A control Switch\17 is connected into the also'constitutes one of the feed wires of themotorL 2. A .relay 18 causes its armature 19to close the circuits 15during working conditions ,which circuit feed wire vof the motor 2. Thespace whose temperature deter- -within' it is the while lthe other end,

mines the operation of the present invention is indicated by the dottedline 2O and thermostat 22 of any well known construction, which opensthe circuit between the wires '23 and 24 when the atmosphere at thatplace is above a certain predetermined temperature and closes thislcircuit when below this or any other prede-4 termined temperature.

Connectetd to the wire 23 is a secondary winding 25 of a transformerwhose primary winding 26 connects to the wires l5 and 16 and as itsresistance is high, little current passes over this winding 26. Thewirey 27 connects this winding 25 to therelay 18 and the wire 28connects the relay to the thermostat 29. The wire 24 connects to asecond thermostat 30 mounted at 32 and having one arm extending into thecombustion chamber 3.

A -wire 33 extends from the feed wire 15 to the contact 341and a branchwire extends from the wire 33 to a heater 35 adjacent the thermostat 29,the other end of the heater connecting by the wires 36 and 37 to thefeed wire 16.- The current flows through the heater whenever the mainfeed circuit is closed..v A primary winding 38 of a transformer of whichthe secondary winding is the coilA 11, connects to a Contact 39 carriedby the thermostat 29 `by the4 wire 33 and to the wire 37 by the wire 37..The operation of this device is as follows.

When the heater 35'is cold the contacts 34 and 39 engage and the twothermostats 29 and 30 Contact. When thel thermostats 29 and 30 becomewarm,

mostat 30 is heated in the combustion chamber. 1 When the switch 17 isclosed an induced current is set up in the relay 18 by reasoi of thewires 24 and 28 being connected-by both swing to the'l left, especiallyas the'lower arm of the ther- If the fuel has become ignited, the upperend of the thermostat 30 swings with vthe lower end of the thermostat 29and maintains contact. But should there be no'ignition for any reasonwhatever, as when there is no fuel` this contact between the thermostatsceases as soon as the thermostat 29 swings to the left, resulting inabroken circuit to the relay 18, an opening of the circuit 15 to themotor and a stopping of the blower.

If the burner functions properly, it will continue to operate until thetemperature around the thermostat 22'exceeds the predetermined degree,when the circuit 23, 24 is opened and the blower stops. As soon as thiscircuit is again closed, the blower will operate while at the same timesparks between the electrodes 8 and 9 will ignite the fuel.

Where the electrode 9 is mounted below a blast of fuel, as sho-wn in thedrawing, soot and lamp black are liable to gather around it and shortcircuit the current. To prevent this, a chamber 41 may be placed withinthe combustion chamber afound the electrode 9, as shown in Fig. 2, and apipe 42 led therefrom to a funnel positioned to receive a portion of theair paing from the blower and this air passing up through the opening 44will prevent soot and other objectionable material from lodging aroundthe electrode.

rlhis invention has been illustrated diagrammatically and any desiredtype and construction of the various parts indicated may be employedwithout departing from the spirit of my invention. as set forth in thefollowing claims.

1. In a liquid-fuel burner, the combination of a blower and an electricmotor therefor, a feed circuit to the motor a relay to close saidcircuit, a transformer having one winding connected to the feed circuitand a second winding connected to the relay circuit, a secondtransformer adapted to produce ignition sparks to ignite the fuel, athermostat to control the circuit to the second transformer, and anelectric heater for said thermostat connected to the feed circuit tocause the thermostat to cut out said igniting transformer.

2. In a liquid-fuel burner the combination of electrically operatedmeans to produce a spray of liquid fuel, a main feed cir- 'cuittherefor, an electric transformer' to produce sparks to ignite thespray, a feed circuit for the transformer, an electric heater connectedto the main feed circuit, and a thermostat adjacent said heater andaffected thereby to open the circuit to said Aignition transformer whenheated.

3. In a liquid-fuel burner the combination of electrically operatedmeans to p-roduce a spray ofliquid fuel, a main feed circuit therefor,van electric transformer to produce sparks to ignitel the spray, a feedcircuit for the transformer, an electric heater connected to the mainfeed circuit, and a thermostat adjacent said heater and affected therebyto open the circuit to said ignition transformer when heated, a relay tocontrol the main feed circuit, a.' second transformer connected into themain feed circuit, a secondary circuit connecting to the secondtransformer and tothe relay, and a thermostat connected into the relaycircuit and adapted to open and close the relay circuit and thereby themain circuit.

4. In a liquid-fuel burner, the combination of electrically operatedmeans to produce a spray of liquid fuel, a main feed circuit therefor,an electric transformer to produce sparks to ignite the spray, a feedcircuit for the transformer, an electric heater connected to the mainfeed circuit, and a thermostat adjacent said heater and affected therebyto open the circuit to' said ignition transformer when heated, a relayto control the main feed circuit', a second transformer.

connected into the main feed circuit, a secondary circuit connecting tothe second transformer and to the relay, and a thermostat connected intothe relay circuit and adapted to open and close the relay circuit andthereby the main circuit, and a third thermostat afectedby thecombustion of the fuel and adapted to keep the relay circuit closedwhile the fuel sp-ray is burning.

5. In a fuel burner, the combination of electrically operated means forproducing a spray of liquid fuel, a circuit controlling the operationthereof, a pair of thermostats in contact with each other duringcombustion of the fuel and adapted to separate when there is nocombustion, a normally energized relay to keep the said circuit closed,

and a second circuit normally closed by they engagement of thethermostats to supply current to said relay.

6. In a fuel burner, the combination of electrically operated means forproducing a spray of liquid fuel, a circuit controlling the operationthereof, a pair of thermostats in contact with each other duringcombustion of the fuel and adapted to separate when there is nocombustion, a normally energized relay to keep the said circuit closed,and a third thermostat affected by the temperature of the adjacentatmosphere adapted to open and close the circuit to said relay. l

7 In a liquid-fuel burner, 4the combination of electrically operatedmeans for producing a spray of liquid fuel, a combustion chambertherefor, a main feed circuit for said spray producer, a relay adaptedto be energized to close the main feed circuit, a transformer connectingthe main feed circuit and asecondary circuit for the relay,

atmosphere to open and close the relay circuit, a heater supplied by themain circuit, an electric igniter for the fuel spray, a transformerconnecting to the main circuit to `eupply induced current to theigniter, a second thermostat adapted to open the primary circuit to theignition transformer, an electric heater connected to the main feedcircuit and adapted to cause the second ther- 10 mostat to open thecircuit to the ignition transformerand a third thermostat mounted on thecombustion chamber and adapted to be caused Aby the heat therein toengage the second thermostat While that is bending because of the heatreceived from said electric heater, the relay circuit being connected tothe second and third thermostats so that it will be broken'when thesecond thermostat alone is heated.

PAUL C. HAAS.

